Maison Olivier Plantation

Maison Olivier Plantation in the Longfellow-Evangeline park in St. Martinville. I'm trying to find out more about this and how it became a State Park and if there is a family crest or coat of arms. Any one have any information on the following names. The below is my Great grandfather with different spellings. Edward Duclozel Olivier also Charles DuClozel Olivier Edward DuClozel DuCologne Chavelier Olivier